Ten-year-old Flavia and her friends encounter the Roman admiral Pliny before making a journey to her uncle's farm near Mt. Vesuvius, where they try to solve a riddle, reunite a family, and get out of the path of a natural disaster.

Flavia and Nubia follow Jonathan to Rome and into the Golden House built by the emperor Nero, where a dangerous assassin lurks.

When a Roman widow shows unusual interest in Flavia's father, Flavia decides to discover Cartila's true motives by performing twelve tasks, just like the Greek hero Hercules.

Jonathan and his friends are called to Rome by the emperor in the winter of 80 A.D. to find the new Prometheus believed to have brought an epidemic to the city, but Jonathan, obsessed with reuniting his parents, makes some unwise--and life-threatening--choices.

Flavia and her friends go to Rome to celebrate the Festival of Jupiter at Senator Cornix's town house, where they befriend the young charioteer, Scopas, and quickly find themselves embroiled in a campaign to sabotage one of the rival racing factions.

The spring of 98 AD is a time of optimism in the turbulent frontier province of Britannia. The season looks set fair for peace and prosperity, and business is brisk at Aurelia Marcella's inn on the road to York. But soon a wagon arrives bearing a local farmer seeking treatment for a grievous sword wound. Before the farmer dies, he tells Aurelia his family is in grave danger and hints that her sister's family, living near him, is also threatened....